Group 1 (%) | Group 2 (%) | p-value | |
---|---|---|---|
Median age at RT in years (range) | 70.5 (39–94) | 71 (42–88) | 0.886 |
Gender | |||
Male | 35 (79.5) | 37 (82.2) | 0.124 |
Female | 9 (20.5) | 8 (17.8) | |
T-stage | |||
1–2 | 28 (63.6) | 32 (71.8) | 0.086 |
3–4 | 21 (47.7) | 13 (28.9) | |
Desolate dental status (caries, periodontal disease) | 36 (81.8) | 17 (37.7) | 0.228 |
Need for pre-RT dental treatment | 31 (70.5) | 12 (26.7) | 0.001 |
Tooth protection during RT | 41 (93.2) | 40 (88.9) | 0.303 |
Systemic therapy | |||
CHT | 22 (50.0) | 28 (62.2) | 0.475 |
IT | 8 (18.2) | 1 (2.2) | |
none | 14 (31.8) | 16 (35.5) | |
Smoking history | |||
yes | 29 (65.9) | 19 (42.2) | 0.453 |
no | 15 (34.1) | 26 (57.7) | |
RT technique | |||
3D-CRT | 7 (15.9) | 2 (4.4) | 0.519 |
IMRT | 37 (84.1) | 43 (95.6) | |
Dmean to mandible | |||
< 45 Gy | 25 (56.8) | 41 (91.1) | 0.023 |
> 45 Gy | 19 (43.2) | 4 (8.9) | |
Dmax of mandible | |||
< 50 Gy | 2 (4.5) | 10 (22.2) | 0.033 |
51–60 Gy | 22 (50.0) | 19 (42.2) | |
> 60 Gy | 20 (45.5) | 16 (35.5) | |
PTV dimension (ccm) (range) | 804 (68–4838) | 796 (170–1389) | 0.028 |